The Electron Batting Helmet features a rubberized Matte finish and an ABS plastic shell with PEPP (Porous Expanded Polypropylene). The PEPP system is designed for multiple impact protection by absorbing energy on impact and then the padding returns to its original shape. Dial-fit system and Pro Dri lining offers an extremely comfortable and adjustable fit. One-size-fits-most: 6 3/4 - 7 5/8.